ANSWER FOUND! COOL! Calculating change in POI for change in velocity
Select Gate
READ GTA FORUM RULES BEFORE POSTING
GTA Forum Help Desk
GTA Announcement Gate
Dealer Area
GRIP
AirgunWeb Airgun Videos
Airgun Repository of Knowledge
Vendors and Vendor Videos
AirGun Expo 2021
Airgun Expo 2022
Contests and Giveaways!!!
Welcome New Members
In Memoriam
GTA Contributing Members
Shot Show Videos
Hajimoto Productions
Airgun Detectives
Air Gun Gate
BB Guns and Such
"Bob and Lloyds Workshop"
American/U.S. Air Gun Gates
European/Asian Air Gun Gates
PCP/CO2/HPA Air Gun Gates "The Darkside"
Air Archery
Vintage Air Gun Gate
Air Guns And Related Accessories Review Gates
Hunting Gate
Machine Shop Talk & AG Parts Machining
3D printing and files
Buyer's, Seller's & Trader's Comments
Bargain Gate
Back Room
Target Shooting Discussion Gate
Target Match Rules
Shooting Match Gates
Field Target Gates
The Long Range Club
100 Yard Match
Discussions By States
Welcome,
Guest
. Please
login
or
register
.
Did you miss your
activation email
?
1 Hour
1 Day
1 Week
1 Month
Forever
Login with username, password and session length
Home
About
Help
Old GTA
Gallery
Search
Stats
Login
Register
Advertise Here
GTA
»
Target Shooting Matches, Discussion & Events
»
Target Shooting Discussion Gate
(Moderators:
gamo2hammerli
,
Hoosier Daddy
) »
ANSWER FOUND! COOL! Calculating change in POI for change in velocity
« previous
next »
Print
Pages: [
1
]
Go Down
Share This!
Author
Topic: ANSWER FOUND! COOL! Calculating change in POI for change in velocity (Read 724 times))
lloyd-ss
Bob and Lloyd
GTA Senior Contributor
Posts: 3567
Real Name: Lloyd
ANSWER FOUND! COOL! Calculating change in POI for change in velocity
«
on:
February 03, 2018, 09:35:14 AM »
There must be an easy way to do this, but I am baffled, and I hope someone can help.
Using available free software, like Chair Gun or similar, if a gun is sighted in at 50 yards with a pellet that goes 900fps, and the velocity for the next shot is, say, 850fps, how much lower will the POI of the second shot be on the 50yd target, if you use the same POA?
What I am trying to do is determine how big the vertical spread is for a particular velocity spread in a gun.
Thanks, Lloyd
«
Last Edit: February 04, 2018, 10:07:15 AM by lloyd-ss
»
Logged
Central Virginia
An engineer by nature. The affliction is knowing that everything can be made better. It is easy to make one that works, but it is difficult to make on that works WELL.
My YouTube channel is Airgun Lab
Back_Roads
I Got A 15 Pump BB Gun :) BB Guns Got Much More Complicated :)
GTA Senior Contributor
Posts: 15712
1st Edition Crosman 760 Pump Master
Real Name: James Seiler
Re: Calculating change in POI for change in velocity
«
Reply #1 on:
February 03, 2018, 10:13:27 AM »
With Chair Gun I just re enter the various velocities . I would then have to make my own chart to show each shot with corresponding drops in POI with FPS.
Logged
Wisconsin Collins Hunters Paradise" There's a Sign in Town to Prove It
https://www.zeemaps.com/group=962067
Member Map.
[smg id=6202]
https://www.youtube.com/channel/UC3hMPAjvTtuu7DoNzBZzuKQ?view_as=subscriber
https://youtu.be/PZvrk-L6Gzg?list=PLASJo4rBxMIkewLOlcMHC56YM0BpdR6cb
https://youtu.be/bk_N1l7H2F4?list=PLASJo4rBxMIk6BNY6V_tZahlmptN6qBlk
lloyd-ss
Bob and Lloyd
GTA Senior Contributor
Posts: 3567
Real Name: Lloyd
Re: Calculating change in POI for change in velocity
«
Reply #2 on:
February 03, 2018, 10:29:22 AM »
Thank you James, Got it. I see that is one method to predict how velocity changes will affect your target. Chair Gun has a "compare" function, which I just saw for the first time. So I looked at the help menu and found the section titled "The Least You Need to Know." Oops. I think that is funny, but so true.
Logged
Central Virginia
An engineer by nature. The affliction is knowing that everything can be made better. It is easy to make one that works, but it is difficult to make on that works WELL.
My YouTube channel is Airgun Lab
lloyd-ss
Bob and Lloyd
GTA Senior Contributor
Posts: 3567
Real Name: Lloyd
Re: Calculating change in POI for change in velocity
«
Reply #3 on:
February 04, 2018, 10:06:28 AM »
I found the answer,
and it is pretty cool!
In ChairGun, do the setup like you normally would, with the pellet, velocity, etc.
Then, in the menu at the top of the page, click on Toolbox, and then on Vertical Stringing.
A window will pop up with the data that you have already set up, BUT, there is a new box for "Velocity, +/-".
If your gun's velocity varies +/- 10 fps, enter that. Then look at the table, and scroll down to the range you are shooting at and it will show you the +/- variation in inches at that distance. Very Cool!
Logged
Central Virginia
An engineer by nature. The affliction is knowing that everything can be made better. It is easy to make one that works, but it is difficult to make on that works WELL.
My YouTube channel is Airgun Lab
Print
Pages: [
1
]
Go Up
« previous
next »
GTA
»
Target Shooting Matches, Discussion & Events
»
Target Shooting Discussion Gate
(Moderators:
gamo2hammerli
,
Hoosier Daddy
) »
ANSWER FOUND! COOL! Calculating change in POI for change in velocity